Sources:
Films:
The Penultimate Truth of Philip K. Dick
The Gospel According to Philip K. Dick
Philip K. Dick: A Day in the Afterlife, from the BBC series Arena, 1994
Blade Runner (Ridley Scott)
A Scanner Darkly (Richard Linklater)

Other audio sources:
Book on tape of Do Androids Dream of Electric Sheep? (read by Matthew Modine and Calista Flockhart)
X-Minus One radio program of PKD’s The Colony, 1950s
Book on tape of Ubik
Hour 25 Interview of Philip K. Dick conducted by Tim Hodel in 1977